He and McAdams were first spotted enjoying dinner at Osteria Mozza in West Hollywood, Los Angeles early last month.

"I don't know if it's full-blown love yet, but they talk constantly. They're really into each other. She talks about him all the time!" a source said. The "Notebook" actress, who previously dated Ryan Gosling, was most recently linked to her "Southpaw" co-star Jake Gyllenhaal.